Works like a charm!
Mercedes-Benz GLC-Class SUV X540 EQ airbag control unit repair
Mercedes-Benz GLC-Class SUV X540 EQ airbag control unit repair at Airbag24
Airbag24 repairs defective airbag control units professionally and affordably. Both private customers and workshops can order without registration and benefit from fast processing, 2 years' statutory liability for defects and plug&play installation.
Airbag24 works with state-of-the-art diagnostic technology and specialised repair processes. Because defective control units often involve only individual components, a professional overhaul can be considerably cheaper than buying new.
Our advantages: no registration required, a direct online ordering process for B2B and B2C customers, express shipping and comprehensive quality testing. The repaired control unit works like a new part.
Notes
Mounting position
Repair type
Which repair matches your fault code?incl. VAT plus shipping
Not sure? Just send us an enquiry or give us a call — we're happy to advise you.
4.8Google reviews of our shop(233)
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Repair time
Our estimated repair time for this product is about: 3–4 business days
Which repair matches your fault code?
Below your code you can see what needs to be done.
Your error code isn't listed? The list isn't complete – we can usually repair it anyway. Simply create a repair order, or ask us first.
Specifications
- Make
- Mercedes-Benz
- Model
- Mercedes-Benz GLC-Class
- Series
- SUV X540 EQ (2026-XXXX)
Shipping & repair from Germany
Airbag24 repairs your component in Berlin — usually within 3–4 working days.
Standard shipping within Germany is free; we normally return your part by UPS.
You pay for and insure the inbound shipment to us. On explicit request we ship by express — the extra cost is borne by the customer.
If you withdraw from the contract, you bear the cost of returning the item.
Google reviews
4.8Based on 233 reviewsView all reviews →
Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!
Automatically translated · Original: German
From the first phone call, the order processing, to the shipping, everything was done very quickly and professionally. Now I still have to send the repaired unit to the Swedish workshop and then hopefully the Honda can finally pass the HU there again (failed because of the red airbag light). Thanks to Airbag 24 in Berlin 👍👏. Gerd
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Fast repair and fast shipping Simply top
Automatically translated · Original: German
Everything works great
Automatically translated · Original: German
Ultra fast delivery, fit really well in the end. There was even a pen and gummy bears included. :D Definitely again, thank you very much!
Automatically translated · Original: German
What is a Mercedes-Benz GLC-Class SUV X540 EQ airbag control unit?
The airbag control unit, also called the SRS control unit, is the central control unit of the restraint system (SRS) in the Mercedes-Benz GLC-Class SUV X540 EQ. It evaluates the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners deploy. After an accident it stores crash data and locks itself.
The unit is installed in the Mercedes-Benz GLC-Class SUV X540 EQ (since 2026). During operation it constantly monitors sensors, squib circuits and the on-board voltage. If it registers a fault, it switches on the airbag warning light and enters the fault in the fault memory. You therefore notice a problem before the system is needed in an emergency.
Airbag24 is based in Berlin and works on a send-in basis: you remove the control unit, we test and repair exactly this unit, and it is then returned to you.
Why is the Mercedes-Benz GLC-Class SUV X540 EQ airbag control unit defective?
The most common cause is crash data that an accident leaves in the unit, even if no airbag deployed; a standard diagnostic tool cannot erase it. Ageing electronic components, cold solder joints, moisture with corrosion on connectors and voltage spikes in the on-board electrical system are also possible causes.
The accident comes first in the chain: the stored crash data keep the unit locked, and a standard diagnostic tool does not remove them. Ageing follows. Electronic components lose reliability over the years, and cold solder joints break contacts. Next comes moisture, which causes corrosion on connectors. Finally, fluctuations in the on-board electrical system put strain on the electronics, for example voltage spikes during jump-starting or with a weak battery.
If the airbag warning light stays on, the fault memory cannot be cleared or the diagnostic tool finds no contact with the control unit, it is worth reading out the fault memory first. This shows whether the control unit itself is affected or whether a connector, the wiring or an airbag module is causing the fault.
Common error codes for Mercedes-Benz GLC-Class SUV X540 EQ airbag control unit repair
The fault codes assign a fault to an area: communication with other control units, the power supply, the control unit itself, the squib circuits of the airbags or the stored crash data. Which of these actually occur in the Mercedes-Benz GLC-Class SUV X540 EQ depends on the individual fault pattern.
These codes are known for the Mercedes-Benz GLC-Class SUV X540 EQ and may also be stored in your fault memory:
- B1000 → Airbag control unit fault
- B2500 → Internal control unit fault
- B1561 → Trigger threshold exceeded, crash data stored
- U0151 → Communication with the airbag control unit lost
- B1315 → Control unit voltage too low
- B1318 → Control unit voltage too high
- B1420 → Open circuit in the driver airbag squib circuit
- B1421 → Open circuit in the front passenger airbag squib circuit
Fault codes are read out with a diagnostic tool. A single code cannot be taken as proof that the control unit is the cause, because connectors, wiring or an airbag module may equally be responsible. The finding comes only from testing the unit at our workshop.
What part numbers are available for the Mercedes-Benz GLC-Class SUV X540 EQ airbag control unit repair?
You will find the part number on the label of the control unit. It defines the exact version, because depending on equipment and year of manufacture, different numbers exist within a model series. Enter the number of your unit in the repair order.
For the Mercedes-Benz GLC-Class SUV X540 EQ we currently have no list of known numbers. Please read the number from the label once the unit has been removed. This establishes which version it is. The number does not tell you whether the unit is defective; that only emerges from reading out the fault memory or from testing.
The route to repair looks like this: have the fault memory read out, disconnect the battery and remove the control unit. Then create a repair order online and send in the unit. Testing, repairing and checking take 3–4 working days at Airbag24 as a rule. Afterwards your own control unit is returned to you.
The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.
4.8
Based on 233 reviews
What our customers say
„Works like a charm!“
Leoly3 weeks ago„Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!“
Automatically translated · Original: German
Christian Maegerleinlast week„From the first phone call, the order processing, to the shipping, everything was done very quickly and professionally. Now I still have to send the repaired unit to the Swedish workshop and then hopefully the Honda can f…“
Automatically translated · Original: German
Gerd Goldammerlast week„Fast repair and fast shipping Simply top“
Automatically translated · Original: German
Andreas Foxlast week„Everything works great“
Automatically translated · Original: German
Wolfgang Katenzlast week„Ultra fast delivery, fit really well in the end. There was even a pen and gummy bears included. :D Definitely again, thank you very much!“
Automatically translated · Original: German
Tim Hammer2 weeks ago„I drive a W210 estate. My control unit was broken and because of that I couldn't go to TÜV. I was recommended Airbag24 from a forum. I sent in my control unit. Unfortunately everything was a bit under time pressure and I…“
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Franz Dampf2 weeks ago„Motorhome Fiat Ducato. Fault airbag lamp lit permanently, could also not be reset after reading it out. Fault was permanently present. Quick friendly contact with Airbag24, described the fault, known problem was the stat…“
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Rene Larisch2 weeks ago„Professionals are at work here, any additional repairs that may arise are carried out without complaint and without discussion...always happy to come back.“
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Manfred Gunia3 weeks ago„From the order to the repair everything worked well, airbag control unit installed, the light goes off again as it should, good service, fast repair and return shipping. Thanks 👍👍👍“
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Petra3 weeks ago„Got the second airbag control unit from you for another car. Fits, no more error message. Great service Can only recommend. Super fast delivery, and they keep what they promise. A big thank you to this company.“
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Mama 43 weeks ago„Super fast service and repair Fast processing“
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Dennis Baron4 weeks ago„Works like a charm!“
Leoly3 weeks ago
